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x in (-oo:+oo)
x/5-(2*x)-(5/3) = 2/3 // - 2/3
x/5-(2*x)-(5/3)-(2/3) = 0
x/5-2*x-5/3-2/3 = 0
-9/5*x-7/3 = 0 // + 7/3
-9/5*x = 7/3 // : -9/5
x = 7/3/(-9/5)
x = -35/27
x = -35/27
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